Corrupt boot project if the boot project was created after an online change (eliminated from V3.3.2)

Corrected from:
PLC Designer V3.3.2

Behaviour of the new version?
From version V3.3.2 of the PLC Designer, the functional restriction only occurs if an online change has been carried out after changing the initial value of a variable.




What is the reaction?
The following reactions can be observed:
? Starting the PLC in the controller leads to an exception. The PLC project is not processed.
? The process images from backplane Is/Os and fieldbus devices are not updated and retain their initialisation value.
? The machine does not show the programmed behaviour without an exception having occurred beforehand.

When does the problem occur?
The reactions described above occur after mains switching of the controller if a boot project was previously created online after an online change.

What products are affected?
PLC Designer version V03.03.00

Diagnostics options?
? Check the IPC logbook to see whether it contains the entry 'EXCEPTION in CmInit()'.
? If you have connected a monitor directly to the controller or connected a monitor to the controller via the VNC server, you can view the console and check whether the Exception message has been output.
? Go to the I/O Mapping tab in PLC Designer and check whether there are any plausible I/O signals.

N.B. !
It is not necessary to diagnose all instances of errors – especially if an exception does not occur.

Short-term measures/recommendations?
? After the online change, carry out a 'Clean All'. Load the project into the controller and then create the boot project online.
? After an online change, create the boot project offline and load it into the controller.

Evaluation:
In order to store a project change (e.g. due to an online change) in the controller so that the change remains stored even if the mains supply is cut off, a boot project has to be created in the controller. If a boot project is created after an online change, the boot project may be corrupt. After the controller has been switched off and on again, loading the corrupt boot project causes the reactions described above.

URL for linking this AKB article: /en-de/go/akb/201207814/1/
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